Continuous centrifugal straining apparatus.



I A. J. micsson. CONTINUOUS GENTBIFUGAL ST BAINING APPARATUS.

APPLIOATION FILED JULY 24,1908.

Patented Nov. 16. 1909.

2 SHEETS-BHEET 1.

' I 19mm A. J. ERIGSSON.

CONTINUOUS GENTRIFUGAL STRAINING APPARATUS.

APPLICATION FILED JULY 24, 1908.

Patented Nov. 16, 1909 2 SHEETS-SHEET 2.

l/V VEN rim ay a ATTORNEYS UNITED STATES PATENT OFFICE.

ANDERS JOHAN ERICSSON, OF STOCKSUND, STOCKHOLM, 'SWEDEN, ASSIGNOR TO AKTIEBOLAGET SEPARATOR, A COMPANY, OF STOCKHOLM, SWEDEN.

CONTINUOUS CENTRIFUGAL STRAINING APPARATUS.

To all whom it may concern;

Be it known that I, ANnEus- JoHAN EmcesoN, a subject of the King of Sweden, residing at Stocksund, Stockholm, Sweden, civil engineer, have invented certain new and useful Improvements in Continuously-Working straining Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and'to letters of reference marked thereon, which form a part of this specifi cation.

My invention relates to centrifugal apparatus for the continuous separation of liquids from solids suspended in liquids, such for instance, salts or sugar crystals in water.

Speaking generally, with respect to my invention, 1 provide a central perforated drum surrounded by a stationary cylindrical vessel. Between the c lindrical vessel and the perforated drum IS a scraper or conveyer which is secured to a frame, which is rotated at a speed different from the rotation of the perforated drum. The liquid is fed into the vessel and into the interior of the drum through the perforations. This prevents thesolid materials from passing into the interior of the perforated drum.'

The rotation of the perforated drum throws off from its periphery any solid materials attached thereto, which are carried by the conveyer along the cylindrical vessel to one end thereof, where, by means of shovels, they are carried to an elevated point from which they pass through an opening into a chute, thus being delivered from the machine. The

liquid passes out through an appropriatepipe from the interior of the perforated drum.

My invention is illustrated in the an- Specification of Letters Patent. P t t 1 1909,

Application filed July 24, 1908.

Serial No. 445,173.

S01 is mounted a drum 0 consisting of two heads (I connected by longitudinal strips 11.

' Connected to these strips 1s a metallic cloth,

of the perforated drum escapes. This pipe c is supported by a bearing f attached to one end of the cylindrical casing a. Secured to the tube 0 is a gear wheel 9 which is rota-ted by appropriate means, not shown. The rotation of this gear im )arts a rotary movement to the perforated rum. On the other end of the perforated drum is a trun nion h, which is supported in the hub In the s acebetween the perforated drum 0 and t e surrounding vessel aoblique scrapers or screw-conveyer Z are placed. These oblique scrapers or screw-conveyer are preferably fixed to the skeleton frame m extending from end to end of the machine. This frame-work is rotatably mounted at one end upon the outlet pipe c, and on the other end upon the hub On the hub i is fixed a gear wheel 79 which may be rotated by appropriate means, not shown, and by its rotation imparting to the frame we a rotary movement independent of that imparted to the drum.

The end of the apparatus corresponding to the hub z is enlarged radially to contain the shovel wheel comprising the head a and the ring 8, between which head a and the ring 8, are the shovels r secured to said parts. The head a forms one end of the frame-work which carries the scrapers or screw conveyer. At 10 is an opening from the chamber in which the shovel wheel rotates, communicating with the inclined chute t, through which opening and into which chute the solid particles fall from the shovels and are carried by the incline of the chute out of the a paratus. V

The operation is as ollows: The liquid to be treated enters by the pipe b and fills the vessel, for instance, up to the level marked u. Whatever liquid there is within the interior of the perforated drum, in passing through the perforations, loses its solid material. When the parts are rotated, as before described, any solid particles which are attached to the periphery of the perforatqd drum are thrown off therefrom, and also 1n the passage of the liquid to the perforated drum solid particles are thrown off toward the outer casing. Here they are caught by the scrapers or conveyer, which are rotated at a different speed from that of the drum,

and carried to the enlarged end of the apparatus, where they are caught by the shovelwheel 1' and conveyed to the highest point,

from which they pass through the opening w onto the chute t passing along the chute being an inlet to said vessel for the liquid to be treated, and means to convey to the outside of the apparatus the solid particles thrown off from the perforated drum and centrifugally deposited on the inner wall of the surrounding vessel.

2. In a continuously working centrifugal straining apparatus, in combination a perforated rotating drum, a stationary cylindrical vessel surrounding said drum, there being an inlet to said vessel and an outlet from the interior of thedrum for the fluid, passing through the perforations and means toconvey the solid particles thrown off from the perforated drum and centrifugally deposited on the inner wall of the surrounding vessel to the outside of the appa- ,ratus.

3. In a continuously workingc'entrifugal straining apparatus, in combination a perforated, rotating drum, a stationary cylindrical vessel surrounding said drum, there being an inlet to said vessel, and an outlet from the interior of the perforated drum and rotating scrapers in the space between the drum and the vessel for conveying the solid particles centrifugally deposited on the inner .wall of the surrounding vessel to the outside of the apparatus.

4. In a continuously working centrifugal straining apparatus, in combination a perforated rotating drum, a stationary cylindrical vessel surrounding sald drum, there being an inlet to said vessel, and an outlet from the interior of the,drum for the separated fluid, and rotating oblique scrapers inv straining apparatus in combination a p'er-.

forated rotating drum, a stationary cylindrical vessel surrounding said drum, an inlet to said vessel, an outlet from the interior of the drum, rotating scrapers in the space between the drum and the vessel for conveying the solid particles to the end of the vessel, and a shovel-wheel at said end of the apparatus catching up the particles and delivering the same to the outside of the apparatus.

In testimony, that I claim the foregoing.

as my invention, I have signed my name in presence of two subscribing witnesses.

ANDERS J OHAN ERICSSON. Witnesses: HARRY ALBIHY, HJALMAR ZETTERSTROM. 

